Exposure Position influences on the corrosion

Abstract

objective To study influences on the corrosiveness of pure copper in the tropical marine atmosphere circumstances of diff Erent exposure positions. Methods the T2 copper in Sanya Tropical beach the different offshore distances was tested for months of marine atmospheric exposure. Combined with the changing conditions of deposition and humidity of chloride Ion, accordingly in the air, morphology, ingre Dient and phase of the corrosion products were analyzed with SEM, X-Ray EDS, and XRD. Results T2 Copper in tropical marine atmosphere corroded uniformly. Its average corrosion speed decreased with the increase of the distance to the ocean of surfaces. The corrosion products were in a bilayer structure, the outer sphere of which is green Cu2</ b16>(OH)3Cl; the inlayer was dense Cu2 o.with The increase of the distance to the ocean surfaces and the time of exposing, the heavier th e concentration of the chloride Ionin the electrolytes on the surface of the the samples and the more the Cu <b1 12>2(OH)3Cl in corrosion products of TS Copper. Whereas, Cu2O is the most in thecorrosion products. Conclusion There were significant differences between corrosion rate and salt spray deposition with offshore distance Chan GES, salt spray deposition the increased and then decreased, with the maximum value in the the meters;